Finding the Fourth Proportional to 1,633.47, 2,434.71 and 1,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,633.47 : 2,434.71 = 1,620.72 : x
2. Step 2: Convert to fraction form
   1,633.47/2,434.71 = 1,620.72/x
3. Step 3: Cross multiply
   1,633.47x = 2,434.71 × 1,620.72
4. Step 4: Simplify right side
   1,633.47x = 3,945,983.19
5. Step 5: Solve for x
   x = 3,945,983.19/1,633.47
6. Step 6: Final answer
   x = 2,415.71